AT45DB321D-SU SL383 Atmel, AT45DB321D-SU SL383 Datasheet - Page 39

• Manufacturer Part Number: AT45DB321D-SU SL383
• Manufacturer: Atmel

Specifications of AT45DB321D-SU SL383

• Density: 32Mb
• Access Time (max): 6ns
• Interface Type: Serial (SPI)
• Boot Type: Not Required
• Address Bus: 1b
• Operating Supply Voltage (typ): 3.3V
• Operating Temp Range: -40C to 85C
• Package Type: SOIC EIAJ
• Program/erase Volt (typ): 2.7 to 3.6V
• Sync/async: Synchronous
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 3.6V
• Word Size: 8b
• Number Of Words: 4M
• Supply Current: 15mA
• Mounting: Surface Mount
• Pin Count: 8
• Lead Free Status / RoHS Status: Compliant

22. Write Operations
The following block diagram and waveforms illustrate the various write sequences available.
22.1
22.2
3597M–DFLASH–3/09
SI (INPUT)
Buffer Write
Buffer to Main Memory Page Program (Data from Buffer Programmed into Flash Page)
CS
SI (INPUT)
CS
represents 8 bits
Each transition
PAGE PROGRAM
BUFFER 1 (512/528 BYTES)
MAIN MEMORY
PAGE (512/528 BYTES)
BUFFER 1 TO
CMD
BUFFER 1
WRITE
X
15 DON'T CARE + BFA8-BFA0
CMD
BINARY PAGE SIZE
X···X, BFA9-8
FLASH MEMORY ARRAY
I/O INTERFACE
PA12-6
Starts self-timed erase/program operation
BFA7-0
SI
A21-A9 + 9 DON'T CARE BITS
BINARY PAGE SIZE
BUFFER 2 (512/528 BYTES)
n
PA5-0, XX
Completes writing into selected buffer
n+1
BUFFER 2 TO
MAIN MEMORY
PAGE PROGRAM
BUFFER 2
WRITE
XXXX XX
n = 1st byte read
n+1 = 2nd byte read
Last Byte
39